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02-11-2010, 03:01 AM   #1
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Sigma f2.8 24-70 HSM vs non HSM

The question is "Is it worth it?"

The HSM costs 680, the non-HSM 450.

My research so far tells me that, apart from the focus motor, the HSM is 2cm shorter, and apparently sharper.

Is this worth paying over 150% of the prize of the slow one?

Or should I just get the Tamron 28-75 for 300?

On the one hand paying another 300 is absurd - on the other hand I will probably use this lens alot, and divided by the number of days of use/photos taken, the extra 300 is not so much.

I am sure this has been discussed to death, anyone


Last edited by gromgull; 02-11-2010 at 05:17 AM. Reason: typo in title
02-11-2010, 03:15 AM   #2
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Gromgull I don't think this HSM-version lens has come up that much, really. It sure looked like a winner, something I lusted after, but I haven't heard enough about it here on this forum to make me want to buy it yet. That sure sounds like a useful focal range though. The lens itself IS pretty expensive, and I noticed the filter size is 82 mm, those would be kind of pricy. Sigma claims the optical formula is improved over the old, non-HSM version.
02-11-2010, 03:40 AM   #3
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I'd be very interested to see a side by side video focusing test of both my idea of pentax's sdm is its actually slower than the screw driven focusing system but sigmas hsm using different motors to pentax's sdm so it should be much better..but is it faster than the screw driven focusing? There's some questions for you.
02-11-2010, 03:57 AM   #4
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dopeytree: I borrowed the Pentax DA* 50-150 from my boss for a weekend, and I was very impressed with the speed of the SDM, although that is compared to 55-300 consumer-zoom.

Buying both and comparing was not really the answer I wanted though

02-11-2010, 04:46 AM   #5
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I have one HSM lens and one SDM lens. As far as I can tell, the main advantage seems to be quiet focusing. I can see how that could be very nice for weddings or sneaking up on chipmunks but for my purposes it's not that valuable.
02-11-2010, 07:51 AM   #6
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Look for the Sigma HSM thread in this forum that I started. I put a link to all the reviews I found for it.
The non-HSM has pretty bad flare issues and isn't as sharp as the new one. Depends how much you value sharpness and flare control...
02-11-2010, 03:26 PM   #7
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QuoteOriginally posted by kenyee Quote
Look for the Sigma HSM thread in this forum that I started. I put a link to all the reviews I found for it.
The non-HSM has pretty bad flare issues and isn't as sharp as the new one. Depends how much you value sharpness and flare control...
Hey Ken do you have that link? I searched and google-searched too but couldn't find that particular post. I'm still interested in that Sigma...
02-11-2010, 05:12 PM   #8
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never: I searched using sigma hsm and my username. Here's the link:
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/51046-sigma-24...gma+hsm+kenyee

04-08-2010, 12:15 PM   #9
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I think the Tamron 28-75mm would be a good alternative. Unless you really want HSM. Smaller, very sharp, good warranty...cheaper!
I bought one, and it's a very nice lens. Besides, I much rather have 67mm filter than 82 mm... it must be huge!
good luck
01-09-2011, 05:31 PM   #10
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I don't seem to see much discussion here about the Sigma 24-70 f2.8 HSM. I'm wondering if anyone has it or has used this lens and what are you thoughts. It seems to get great reviews. While my photography skills may not warrant a lens this pricey, I want something in the 24-70 range. It would be a 18-55 kit lens replacement and would be on my K-x 80% of the time for general usage and some portrait. I have a Sigma 10-20 if I need to go wider. I also have a 35-70 and have found it not to be wide enough.
01-09-2011, 09:13 PM   #11
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Dan, somebody had one for sale in the Marketplace about a month ago, but that is the first I'd seen on this forum of anyone actually owning or using the new Sigma 24-70. (Emphasis added because somebody invariably chimes in about the old version.) Maybe you can do a search and PM that person for their opinion. Although since they were getting rid of it perhaps it was not that highly thought of! I'm still curious, myself.
01-10-2011, 12:47 PM   #12
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I have the Canon mount copy of the non-HSM older version. It's one of my most-used lenses. It flares more than I'd like sometimes, and the 82mm filter size is a bugger. It's heavy and big, since it'll do full-frame, too. I also don't like the fact you have to flip a switch AND pop the focus ring to go from MF to AF, the MF gear ratio is really fast (not super precise), and it's not always as sharp as my Tak or Canon AF primes (even at f/8 or smaller), but it is sharp enough to make 20x30 inch prints that look good from a 10 inches away on my 10MP digital. It's not perfect, but it definitely gets the job done and doesn't ever give me any "issues." AF is good, not super quiet, but I've never had that affect anything. The semi-macro capabilities are really nice, too. I like it more and more, and still use it all the time.

I've thought about selling it or giving it to my girlfriend and upgrading to the HSM version, but I tend towards using fast primes when I have the choice, so I'll probably keep it until it dies, upgrading my primes first and then go for the Canon 24-70L once this one dies.
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